Leaf-spring.



L. Ni. FELTS.

LEAF SPRING. APPUCATIQH F1LED1UNE3,1913. www Nov. 11,19111 Patenm uly 13, 1915.

T0 all whom it may concern LYTAI. M. IELTS, or BALTIMORE, lvrAarrtA'rin.`

LEAF-SPRING.

andere.

Appiication med :une a, 1913, sria1No.,771,452

Be it known that I, Lr'rAL M. FnL'rs, a citizen of the United States, residing at Baltimore, State of Maryland, have invented new and useful Improvements in Leaf- Springs, of which the following is a speciication. A

Theinvention has relation to built up springs comprising a plurality of leaves or plates arranged one upon the other, and has for its object to provide a lspring of the type aforesaid possessing great elasticity, thereby resulting in easy riding, and furthermore providing a spring which is practically noiseless and capalole of being lubricated and to retain such lubrication without permitting the same to escape and collect dust or cause the spring to assume a besmeared api pearance.

I of the spring.

The invention consists of the novel features, details of construction and combination of parts,.which hereinafter will be more particularly set forth, illustrated in the accompanying drawing, and pointed out in the appended claim. s

Referring to the drawing, forming a part of the specification, Figure 1 is a side view of a semi-elliptic bow spring embodying the invention. Fig. 2 is a central longitudinal section of the spring. Fig. 3 is a transverse section on the line of F ig. 1. Fig. 4 is a detail view `of one of the leaves or plates Corresponding and like parts are referred to in the lfollowing description, and indicated in all the views of the drawing, by the sam;l reference characters.

The invention is applicable to the type of springs embodying a plurality of leaves or plates 1, which have asuperposed arrangement, such springs usually being of the semi-elliptical or bos7 type, as indicated most clearly in- Figs. land 2 of the drawing.

The leaves or plates 1 of the spring progressively decrease in length and eachA of` such leaves or plates 1 is of ysimilar formation, the same tapering toward the extremities.

The essential feature of the invention re'- sides in the provision of a recess in each end portion of a leaf or plate to rovide a space adapted to 'receive and ho d a lill'bricantA whereby the'leaves or plates are adapted to.

Specification ofvLetters Patent.

ffoin a. vii'riddle point Renewed November 17, 1914.` Serial No. 872,650.

move freely one upon. the other in the operation of the spring when subjected to vertical thrusts. leaves or plates are of uniform thickness transversely so as to rest firmly upon one another and admit of the plurality of leaves or plates being bound together by means of a clip or in any manner usually provided. The recess 2 is practically of uniform width throughout its length, the inner end portion tapering and vanishing into the side of the leaf or plate provided with such recess. The marginal portion 3 inclosing the recess 2 is of a width to insure a substantial bearing portion between the several leaves or plates so as to sustain the strain'when the spring is in active service. l

It is observedv that the inkvention results in Patented July 13, 1915.

The middle portions of the the provision of a leaf spring having the terminal portions of the leaves or plates formed with recesses which are adapted to receive and hold a lubricant, whereby the extremities of the leaves are adapted to play freely upon one another when the spring is 1n operation, with the result that vthe elasticityof the spring is increased, the

easy riding qualities enhanced and noise prevented bythe-rubbing of the leaf terminals upon one another.

Having thus ldescribed the inventionhwhat is claimed as new, is

A spring comprising a plurality of leaves or plates of uniform `width arranged one vupon the other and having their middle porv tions of uniform thickness so as tp touch throughout their length, the end portions of recesses are formed, and the marginal portions of the leaves at the sides and`ends of' the recesses touching to sustain the load and retain the lubricant.

In testimony whereof I aiir my sig'rlat're,l

in presence of-twowitnesses.`

i i. l LYTAL' M. BELTS.

llfitnessemA J.IRv1Ne CLARK, HARonnW. MlLLERl 

